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20120921
20120921
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, there are conflicting views of beijing's role as banker to the united states government. some see it as a source of leverage, but others see chinese holdings of u.s. debt as an investment with little return. >> it's not invested in their own country. it hasn't been given to their own people. it's a gigantic waste of money. and really, it does not give china leverage over the u.s., because if they used it, they'd only be shooting themselves in the foot. so, in that respect, i think it's as much a symbol of a weak imbalances in the chinese economy as it is of chinese power. >> reporter: and even if the chinese government wanted to sell off u.s. treasuries, it's not clear it could find a buyer. >> the bigger problem is if they announced that they were simply not going to participate in the next treasury auction or the next three or four treasury auctions. that would produce something of a scramble to see who would participate. the result would probably be some increase in interest rates here. >> reporter: but even that seems likely to hurt china as much or more than the united states. china buys u.
the united states? >> indeed, there is. the arctic sea ice essentially is a big reflector of solar energy during the summer and that keeps the arctic cooler than it normally would be. it acts like an air conditioner for the earth's climate system and that helps not only keep the arctic cooler but also the globe as well. and it's basically a safe for heed that comes in at the equator, gets transported to the north you lose the heat in the arctic. and that transfer of eat from the equator to the poles, that essentially helps set up things like the jet stream, prevailing winds, weather tracks. so as we start to lose the ice cover and warm up the arctic, essentially that's changing the balance between the kuwaitor and the poles and that will shift things like storm tracks and the jet stream and that will change weather patterns and we've seen some evidence of that already and we expect to see more in the future, although we're still in the early stages of understanding that completely. >> suarez: you know, it's a commonplace in stories written about what's happening in greenland, what's happe
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